#19366 [Opn->Fbk]: buggy GD scripts crashes PHP

ID: 19366 Updated by: sander@php.net Reported By: honza@honza.info -Status: Open +Status: Feedback Bug Type: GD related Operating System: linux mandrake 2.4.19-7mdk PHP Version: 4.2.3 New Comment: Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2002-09-12 01:55:30] honza@honza.info Hello, well, this will be more tricky, as it doesn't happen on my local computer (win32), but the web-hosting server I use (and pay). I exchanged several e-mails with the administrator of the web-hosting service (www.pipni.cz) and it crashes: mandrake 2.4.19-7mdk + PHP 4.2.3 completely, including apache same on redhat on slackware 8.1 + php 4.2.2 only the script crashed, not whole server. Now to the script. I got this script from a Czech PHP course and there was a bug in the script. It creates a bitmap and then draws into the bitmap. The bug is the bitmap is too small, the coordinates used in draw and fill functions are beyond the size of the bitmap. And the fill functions that get the starting point outside of bitmap let it go down. Here is the script: <?php $width = 50; $height = 100; $ImHandle = imagecreate($width,$height); //Define colors $MyBlue = imagecolorAllocate($ImHandle, 0, 0, 255); $MyRed = imagecolorAllocate($ImHandle, 255, 0, 0); $MyWhite = imagecolorAllocate($ImHandle, 255, 255, 255); $MyBlack = imagecolorAllocate($ImHandle, 0, 0, 0); //Draw ImageFill($ImHandle,0,0,$MyBlack); ImageLine($ImHandle,20,20,180,20,$MyWhite); ImageLine($ImHandle,20,20,20,70,$MyBlue); ImageLine($ImHandle,20,70,180,70,$MyRed); ImageLine($ImHandle,180,20,180,45,$MyWhite); ImageLine($ImHandle,180,70,180,45,$MyRed); ImageLine($ImHandle,20,20,100,45,$MyBlue); ImageLine($ImHandle,20,70,100,45,$MyBlue); ImageLine($ImHandle,100,45,180,45,$MyRed); ImageFill($ImHandle,21,45,$MyBlue); ImageFill($ImHandle,100,69,$MyRed); ImageFill($ImHandle,100,21,$MyWhite); ImageString($ImHandle,4,40,75,"Czech Republic",$MyWhite); // Send to browser Header("Content-type: image/PNG"); ImagePNG($ImHandle); //Free resources imagedestroy($ImHandle); ?> Take care Honza ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=19366&edit=1